CN104090445B - 2d/3d switchable stereo display device - Google Patents
2d/3d switchable stereo display device Download PDFInfo
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- CN104090445B CN104090445B CN201410289749.2A CN201410289749A CN104090445B CN 104090445 B CN104090445 B CN 104090445B CN 201410289749 A CN201410289749 A CN 201410289749A CN 104090445 B CN104090445 B CN 104090445B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
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Abstract
The invention belongs to stereo display technique field, particularly relate to a kind of 2D/3D switchable stereo display device, comprise display panel, be located at the liquid crystal lens of display panel light emission side, liquid crystal lens comprises the first substrate and second substrate that are oppositely arranged, and the liquid crystal molecule be arranged between first substrate and second substrate and spacer, first substrate is provided with multiple first electrode, all keep at a certain distance away between adjacent two first electrodes, second substrate is provided with the second electrode, also comprise control module, for controlling the first voltage put between first substrate and second substrate, when 2D/3D switchable stereo display device is in 2D display, first voltage produces the first equal electric field of electric field intensity, first electric field driven liquid crystal deflecting element, make refringence between liquid crystal molecule and spacer in preset range, eliminate because of refringence, light reflects at spacer place, spacer place is caused to there is bright spot or color point, affect the problem of viewing effect.
Description
Technical field
The invention belongs to stereo display technique field, particularly relate to a kind of 2D/3D switchable stereo display device.
Background technology
The mankind are degree of depth that the nuance of the object seen by right eye and left eye carrys out perceptual object, thus identify stereo-picture, and this species diversity is called as parallax.Stereo display technique is exactly the parallax of the right and left eyes being carried out manufacturer by artificial means, sends to two width images of parallax to images of left and right eyes respectively, makes brain after obtaining the different images that right and left eyes sees, produces the sensation of observing true three-dimension object.
That is familiar with liquid crystal material along with people deepens continuously, and the liquid crystal lens adopting liquid crystal material to make has a wide range of applications, as being applied to field of stereoscopic display.The 2D/3D switchable stereo display device structural representation that Fig. 1 provides for prior art.2D/3D switchable stereo display device comprises display panel 1 ＇ and is located at liquid crystal lens 2 ＇ of display panel 1 ＇ light emission side, in the left eye that the light that display panel 1 ＇ sends enters beholder respectively through liquid crystal lens 2 ＇ and right eye, realizes stereo display.Liquid crystal lens 2 ＇ comprises first substrate 21 ＇ that is oppositely arranged and second substrate 22 ＇, be arranged on the liquid crystal layer that includes liquid crystal molecule 23 ＇ between first substrate 21 ＇ and second substrate 22 ＇ and spacer 24 ＇ for supporting thickness of liquid crystal layer, and spacer 24 ＇ generally adopts transparent material to make.First substrate 21 ＇ is provided with multiple spaced first electrode 25 ＇, second substrate 22 ＇ is provided with the second electrode, when 2D/3D switchable stereo display device is used for 3D display, first driving voltage is applied to multiple first electrode 25 ＇, second electrode applies the second driving voltage, electric potential difference between first driving voltage and the second driving voltage, between first substrate 21 ＇ and second substrate 21 ＇, form electric field, liquid crystal molecule 23 ＇ in electric field driven liquid crystal layer arranges and forms the liquid crystal lens unit arranged in array.Therefore, by controlling the first driving voltage on each first electrode 25 ＇, the index distribution of liquid crystal lens 2 ＇ can change accordingly, thus controls the bright dipping of display panel 1 ＇, realizes stereo display and 2D/3D freely switches.When 2D/3D switchable stereo display device is in 2D display state, liquid crystal molecule 23 ＇ of the light that display panel 1 ＇ sends near spacer 24 ＇ and spacer 24 ＇, now, the refractive index of spacer 24 ＇ and the refringence of liquid crystal molecule 23 ＇ larger, light reflects at spacer 24 ＇, as human eye viewing liquid crystal lens 2 ＇, there is bright spot or color some phenomenon at spacer 24 ＇ place, affect viewing effect and the viewing comfort level of beholder.
Prior art discloses a kind of 3 d display device, comprise display panel and liquid crystal lens grating, display panel comprises multiple pixel cell and is arranged on the black matrix between multiple pixel cell, liquid crystal lens grating comprises spacer, the position of spacer corresponds to the position of black matrix in display panel, black matrix is set in display panel, not only affect the display effect of display panel, and black matrix fail complete coverage gap son, when causing human eye to be watched, still there is bright spot phenomenon at spacer place.
Summary of the invention
The object of the present invention is to provide a kind of 2D/3D switchable stereo display device, be intended to solve the above-mentioned one or more technical matters caused by limitation and the shortcoming of prior art.
The present invention realizes like this, 2D/3D switchable stereo display device, comprise display panel, be located at the liquid crystal lens of described display panel light emission side, described liquid crystal lens comprises the first substrate and second substrate that are oppositely arranged, and the liquid crystal molecule be arranged between described first substrate and described second substrate and spacer, described first substrate is provided with multiple first electrode, all keep at a certain distance away between first electrode described in adjacent two, described second substrate is provided with the second electrode, also comprise control module, for controlling the first voltage put between described first substrate and described second substrate, when described 2D/3D switchable stereo display device is in 2D display, described first voltage is for generation of equal the first electric field of electric field intensity, liquid crystal deflecting element described in described first electric field driven, to make refringence between described liquid crystal molecule and described spacer in preset range.
Further, described control module controls to put on the first driving voltage on multiple described first electrode and the second driving voltage on described second electrode, and the difference between described first driving voltage and described second driving voltage is described first voltage.
Further, also comprise the 3rd electrode be arranged between described first substrate and described first electrode, insulation course is provided with between described 3rd electrode and described first electrode, each described first electrode is arranged on described insulation course, described control module controls to put on the 3rd driving voltage on described 3rd electrode and the four-wheel drive voltage on described second electrode, and the difference between described 3rd driving voltage and described four-wheel drive voltage is described first voltage.
Particularly, described first voltage is greater than the threshold voltage of described liquid crystal molecule.
Preferably, the threshold voltage of described liquid crystal molecule is v
th, described first voltage is u
0, and 1.5v
th≤ u
0≤ 4v
th.
Further, described control module is also for controlling the second voltage put between described first substrate and described second substrate, when described 2D/3D switchable stereo display device is in 3D display, the second electric field that described second voltage does not wait for generation of electric field intensity, described in described second electric field driven, liquid crystal deflecting element forms the liquid crystal lens unit that array is arranged.
Further, also comprise the directional diffuser of the bright dipping of described liquid crystal lens being carried out to directed diffusion, described directional diffuser is arranged on the side of described liquid crystal lens bright dipping.
Further, described directional diffuser and described liquid crystal lens are that angle is arranged, and the angle initialization of described angle makes the normal bright dipping when 3D shows of described liquid crystal lens.
Particularly, described angle is α, and 60 °≤α≤120 °.
Preferably, described angle α=90 °.
Further, described directional diffuser comprises the first refractive layer with refringence and the second refractor be coated on described first refractive layer, and described first refractive layer is provided with multiple diffusion unit be arranged in array.
Further, each described liquid crystal lens unit goes out the non-focus place of luminous point at described diffusion unit on described second substrate.
Particularly, the focal length of described diffusion unit is f, described in the distance gone out between luminous point and described diffusion unit be l, and l≤0.5f or l > 2f.
Further, the cross sectional shape of described diffusion unit is semicircle, and the diameter d of described diffusion unit is less than the diameter of described liquid crystal lens unit.
Further, the diameter d of described diffusion unit is 13 ~ 23 times of described spacer diameter.
Preferably, the height of described directional diffuser equals the height of described diffusion unit, the height of described diffusion unit
Preferably, the refractive index of described first refractive layer is N
1, the refractive index of described second refractor is N
2, the refractive indices n=|N of described first refractive layer and described second refractor
1-N
2|>=0.1.
The invention provides 2D/3D switchable stereo display device and control owing to adopting control module the first voltage put between first substrate and second substrate, when 2D/3D switchable stereo display device is in 2D display, first voltage produces the first equal electric field of electric field intensity, liquid crystal molecule in first electric field driven liquid crystal lens deflects, change the refractive index of liquid crystal molecule, make refringence between liquid crystal molecule and spacer in preset range, when eliminating 2D display, because there is larger refringence between spacer and liquid crystal molecule, light reflects at spacer place, when causing human eye to watch 2D/3D switchable stereo display device, the problem of bright spot or color point is there is at spacer place, compared with prior art, promote the viewing effect of 2D/3D switchable stereo display device under 2D display state and viewing comfort level.
Accompanying drawing explanation
Fig. 1 is the structural representation of the 2D/3D switchable stereo display device that prior art provides;
Fig. 2 is the structural representation that 2D/3D switchable stereo display device that the embodiment of the present invention one provides is in 2D and shows state;
Fig. 3 is the light transmition route schematic diagram of the directional diffuser that the embodiment of the present invention one provides;
Fig. 4 is the setting angle schematic diagram of the directional diffuser that provides of the embodiment of the present invention one and liquid crystal lens;
Fig. 5 is the structural representation of the directional diffuser that the embodiment of the present invention one provides;
Fig. 6 is the another structural representation of directional diffuser that the embodiment of the present invention one provides;
Fig. 7 is the another structural representation of directional diffuser that the embodiment of the present invention one provides;
Fig. 8 is the another structural representation of directional diffuser that the embodiment of the present invention one provides;
Fig. 9 is the first refractive layer that provides of the embodiment of the present invention one and the second refractor refracted ray schematic diagram;
Figure 10 is the first refractive layer that provides of the embodiment of the present invention one and the another schematic diagram of the second refractor refracted ray;
Figure 11 is that the 2D/3D switchable stereo display device that the embodiment of the present invention one provides is in 3D display status architecture schematic diagram;
The 2D/3D switchable stereo display device that Figure 12 embodiment of the present invention two provides is in 2D and shows status architecture schematic diagram.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one
As shown in Figure 2, the embodiment of the present invention provides a kind of 2D/3D switchable stereo display device, comprising: display panel 1 and liquid crystal lens 2, liquid crystal lens 2 is arranged at the light emission side of display panel 1.Liquid crystal lens 2 comprises the first substrate 21 and second substrate 22 that are oppositely arranged, and second substrate 22 is arranged at the top of first substrate 21, is provided with liquid crystal molecule 23 and spacer 24 between first substrate 21 and second substrate 22.First substrate 21 is provided with multiple first electrode 25, and all keep at a certain distance away between arbitrary neighborhood two the first electrodes 25, second substrate is provided with the second electrode (not shown).2D/3D switchable stereo display device also comprises control module (not shown), when 2D/3D switchable stereo display device is in 2D display, control module controls the first voltage put between first substrate 21 and second substrate 22, first voltage produces the first equal electric field (not shown) of electric field intensity, first electric field driven liquid crystal molecule 23 deflects, make refringence between liquid crystal molecule 23 and spacer 24 in preset range, the condition meeting preset range is that the difference between the refractive index of spacer 24 and liquid crystal molecule 23 refractive index is less than 0.1, now, the refractive index of liquid crystal molecule 23 is close to the refractive index of spacer 24.
As shown in Figure 2, the 2D/3D switchable stereo display device that the present embodiment provides, when 2D shows, control module controls the first voltage put between first substrate 21 and second substrate 22, first voltage produces the first equal electric field of electric field intensity between first substrate 21 with second substrate 22, under the effect of the first electric field, all liquid crystal molecule 23 degree of deflection are identical, namely the refractive index of liquid crystal molecule 23 is identical, and the refringence met between liquid crystal molecule 23 and spacer 24 is in preset range, now, the refractive index of liquid crystal molecule 23 is close to the refractive index of spacer 24.Therefore, when the light that display panel 1 sends is through liquid crystal molecule 23 and spacer 24, the refraction of light can not be produced, solve existing 2D/3D switchable stereo display device be in 2D display time, because liquid crystal molecule 23 is different from the refractive index of spacer 24, light reflects when through spacer 24, when causing human eye to watch 2D/3D switchable stereo display device, occurs the problem of bright spot at spacer 24 place.Simultaneously, the method of black matrix is adopted relative to prior art, the control module that the embodiment of the present invention provides, control the first voltage put between first substrate 21 and second substrate 22, under the effect of the first electric field, liquid crystal molecule 23 and refringence between spacer 24 in preset range, namely the refractive index of liquid crystal molecule 23 is close to the refractive index of spacer 24, eliminate spacer 24 bright spot phenomenon, and the display effect of 2D/3D switchable stereo display device can not be affected, there will not be the phenomenon of light leak.
In this enforcement, preset range, refer to the scope being less than 0.1 according to the refringence between spacer 24 and liquid crystal molecule 23, deflected by the first electric field driven liquid crystal molecule 23, make the refringence between liquid crystal molecule 23 and spacer 24 less, in preset range, solve 2D/3D switchable stereo display device when 2D shows, due to the refringence existed between liquid crystal molecule 23 and spacer 24, light reflects at spacer 24, spacer 24 place is caused to occur bright spot or color some phenomenon, affect the problem of 2D/3D switchable stereo display device viewing effect.
Particularly, 2D/3D switchable stereo display device is when 2D shows, control module applies the first equal or close driving voltage to multiple first electrode 25, second driving voltage is applied to the second electrode, difference between first driving voltage and the second driving voltage is the first voltage, and the first voltage produces the first equal electric field of electric field intensity.Under the effect of the first electric field, liquid crystal molecule 23 and refringence between spacer 24 in preset range, namely the refractive index of liquid crystal molecule 23 is close to the refractive index of spacer 24, eliminate spacer 24 bright spot phenomenon, and the display effect of 2D/3D switchable stereo display device can not be affected, there will not be the phenomenon of light leak.
As the further improvement of above-described embodiment, as shown in Figure 2, the 2D/3D switchable stereo display device that the embodiment of the present invention provides, the first voltage is greater than the threshold voltage v of liquid crystal molecule 23
th.First voltage produces the first electric field, liquid crystal molecule 23 deflects under the effect of the first electric field, now, refringence between liquid crystal molecule 23 and spacer 24 is less, in preset range, therefore, the light that display panel 1 sends is when through spacer 24, can not reflect, eliminate 2D-3D switchable stereo display device be in 2D show state time, owing to there is refringence between liquid crystal molecule 23 and spacer 24, the refraction of light is there is in light when spacer 24, when causing human eye to watch 2D-3D switchable stereo display device, the problem of bright spot is there is at spacer 24 place.
As the further improvement of above-described embodiment, as shown in Figure 2, the threshold voltage of liquid crystal molecule 23 is v
th, the first voltage is u
0, and 1.5v
th≤ u
0≤ 4v
th.Under normal temperature state, the threshold voltage v of liquid crystal molecule 23
that about 2.6v, the first voltage u
0be greater than the threshold voltage v of liquid crystal molecule 23
thguarantee that all liquid crystal molecules 23 in liquid crystal lens 2 are under the effect of the first electric field, all there is the deflection of same degree in liquid crystal molecule 23, and make refringence between liquid crystal molecule 23 and spacer 24 in preset range, not only solve liquid crystal molecule 23 with spacer 24 because of refringence, there is the problem of bright spot at spacer 24 place, the display effect of 2D/3D switchable stereo display device under 3D display state can not be affected simultaneously.
In the specific implementation, can by the first voltage u
0be set to 3.5v≤u
0≤ 8v, the first voltage u
0be greater than the threshold voltage v of liquid crystal molecule 23
thmake liquid crystal molecule 23 under the effect of the first electric field, the refringence between liquid crystal molecule 23 and spacer 24 is in preset range, and the light that display panel 1 sends is when liquid crystal lens 2, light can not reflect at spacer 24 place, eliminates the phenomenon of spacer 24 place bright spot.
As the further improvement of above-described embodiment, as shown in Figure 2, the 2D/3D switchable stereo display device that the embodiment of the present invention provides also comprises directional diffuser 3, and directional diffuser 3 is for carrying out orientation diffusion to the bright dipping of liquid crystal lens 2, directional diffuser 3 is arranged on the side of liquid crystal lens 2 bright dipping.Can spread further when the bright dipping of liquid crystal lens 2 enters directional diffuser 3, light after diffusion can become and more disperse within the scope of human eye view field space, and then improves the viewing effect of 2D/3D switchable stereo display device under 2D or 3D display state and viewing comfort level.
The directional diffuser 3 that the present embodiment provides weakens 2D/3D switchable stereo display device further when 2D shows, and the problem of faint bright spot appears in spacer 24 place.When 2D/3D switchable stereo display device is in 2D display state, control module controls the first voltage put between first substrate 21 and second substrate 22, first voltage produces the first equal electric field of electric field intensity between first substrate 21 with second substrate 22, and the first voltage is greater than the threshold voltage v of liquid crystal molecule 23
th, therefore, under the effect of the first electric field, liquid crystal molecule 23 deflects, and now, refringence between liquid crystal molecule 23 and spacer 24 is in preset range, because refringence is between the two less, light is when through spacer 24, there will not be refraction effect clearly, the problem that bright spot appears in spacer 24 can be weakened to a great extent, but due to the existence of refringence, still there is faint refraction effect, directional diffuser 3 can spread the bright dipping of liquid crystal lens 2 well, weaken the bright spot phenomenon at spacer 24 place further.
Directional diffuser 3 structure that the present embodiment provides is simple, and during assembling, directional diffuser 3 is positioned on liquid crystal lens 2 by operating personnel, is easy to install.Can be coated with one deck industry glue on the surface of second substrate 22, directional diffuser 3 is fixed on second substrate 22 by industrial glue.When being coated with industrial glue, should ensure that the focal length of directional diffuser 3 is greater than or less than the thickness of industrial glue-line, like this, ensure that the exit positions of liquid crystal lens 2 is not in the focus of directional diffuser 3, the bright dipping diffusion of directional diffuser 3 pairs of liquid crystal lens 2, so just can slacken the phenomenon that bright spot or color point appear in spacer 24 place.Certainly, also can adopt other mounting meanss, as buckle connects or screw connection, directional diffuser 3 is arranged on the light emission side of liquid crystal lens 2.
The directional diffuser 3 that the present embodiment provides can be have the diffusion sheet/plate of directed diffusion function, optical diffusion, lens, light guide sheet/plate, Amici prism or other optical device, and range of choice is wide in range, easily obtains, and cost of products is lower.Directional diffuser 3 is increased at existing 2D/3D switchable stereo display device, not only improve the viewing effect of 2D/3D switchable stereo display device, nor the manufacturing cost of 2D/3D switchable stereo display device can be caused to increase sharply, improve 2D/3D switchable stereo display device product competitiveness in the market.Certainly, directional diffuser 3 also can adopt liquid crystal lens, by regulating the variable focal length of directional diffuser 3, realizes carrying out orientation diffusion to the bright dipping of liquid crystal lens 2.
Certainly, to arranging the spacer 2 evenly sprayed in liquid crystal lens 2, the structure of directional diffuser 3 can be reduced to: directional diffuser 3 position corresponding with spacer 24 is provided with optical scattering structure, all the other can adopt the material identical with second substrate 22 refractive index to make, namely optical scattering structure only carries out orientation diffusion to the bright dipping of spacer 24, the bright dipping of liquid crystal lens 2 is in other positions through directional diffuser 3, the diffusion of light can not be there is, directly enter in the eye of beholder, directional diffuser 3 not only weakens spacer 24 place and occurs bright spot problem, and structure is simpler.
As the further embodiment of above-described embodiment, as shown in figure 11, when 2D/3D switchable stereo display device is in 3D display, the control module that the present embodiment provides, also for controlling the second voltage put between first substrate 21B and second substrate 22B, second voltage produces the second electric field that electric field intensity does not wait, under the effect of the second electric field, liquid crystal molecule 23B deflects with the change of electric field intensity, make the refractive index distribution gradient of liquid crystal layer between first substrate 21B and second substrate 22B, form the liquid crystal lens unit (not shown) arranged in array.Particularly, 5th driving voltage is applied to each first electrode 25B, apply the 6th driving voltage to the second electrode, the difference between the 5th driving voltage and the 6th driving voltage is the second voltage, produces the second electric field that electric field intensity does not wait under the effect of the second voltage.
When 2D/3D switchable stereo display device is in 3D display, second electric field driven liquid crystal molecule 23B deflects, refringence between liquid crystal molecule 23B and spacer 24B is in preset range, in this case, the refractive index of liquid crystal molecule 23B is close to the refractive index of spacer 24B, spacer 24B bright spot phenomenon is comparatively faint, light is through liquid crystal molecule 23B and spacer 24B, still have part light to reflect, when causing human eye to watch 2D/3D switchable stereo display device, there is the problem of bright spot at spacer 24B place.Place directional diffuser 3B, the directional diffuser 3B set up in the light emission side of liquid crystal lens 2B and further weaken or eliminate spacer 24B bright spot phenomenon, promote viewing comfort level and viewing effect.Slacken the problem occurring bright spot or color point at spacer 24B place that the refraction because of light that human eye watches causes.Display panel 1B provides right and left eyes view, and directional diffuser 3B is placed on liquid crystal lens 2B, and is that angle is arranged with liquid crystal lens 2B.Namely the light that liquid crystal lens 2B sends enters in directional diffuser 3B, and directional diffuser 3B carries out orientation diffusion to light, after the light after refraction enters human eye, is still the left and right view of standard, can forms stereo-picture after guaranteeing to enter human eye.Control module can be in different display states according to 2D/3D switchable stereo display device, controls the second voltage between first substrate 21 and second substrate 22, can not affect the normal display of 2D/3D switchable stereo display device when 3D state.The directional diffuser 3B that the embodiment of the present invention provides and control module with the use of, solve 2D/3D switchable stereo display device further when 3D shows, there is bright spot or color some phenomenon at spacer 24B place, affect the problem of viewing effect.
As the further improvement of above-described embodiment, as shown in Fig. 2 and Fig. 4, directional diffuser 3 is arranged in angle with liquid crystal lens 2, and the angle initialization of angle makes liquid crystal lens 2 normal bright dipping when 3D shows.Directional diffuser 3 is in certain angular range, the light that can send liquid crystal lens 2 can carry out orientation diffusion, simultaneously, when the setting of angle angle should guarantee that 2D-3D switchable stereo display device is in 3D display state, liquid crystal lens 2 can normally bright dipping, and the bright dipping of directional diffuser 3 can not affect 3D viewing effect.
As the further embodiment of above-described embodiment, as shown in Fig. 2 and Fig. 4, the angle between directional diffuser 3 and liquid crystal lens 2 is α, and 60 °≤α≤120 °.Directional diffuser 3 is within the scope of certain angle, the light that can send liquid crystal lens 2 can carry out orientation diffusion, when the setting of angle α angle should guarantee that 2D/3D switchable stereo display device is in 3D display state, liquid crystal lens 2 can normally bright dipping, and directional diffuser 3 can not affect 3D viewing effect.Display panel 1 provides right and left eyes view, and directional diffuser 3 is placed on liquid crystal lens 2, and arranges in angle with liquid crystal lens 2.Namely the light that liquid crystal lens 2 sends enters directional diffuser 3, directional diffuser 3 pairs of light reflect, and the light after refraction is still schemed within the scope of respective vision area in left and right, after entering human eye, be still the left and right view of standard, after guaranteeing to enter human eye, can stereo-picture be formed.
As the preferred implementation of above-described embodiment, as shown in Fig. 2 and Fig. 4, angle α=90 ° between directional diffuser 3 and liquid crystal lens 2, namely the dispersal direction of directional diffuser 3 is vertical with the light direction of liquid crystal lens 2, now, the bright dipping orientation diffusion of directional diffuser 3 pairs of liquid crystal lens 2, guarantees that directional diffuser 3 can not affect the viewing effect of 2D/3D switchable stereo display device under 3D display state.
As the further improvement of above-described embodiment, as shown in Fig. 2, Fig. 3 and Fig. 5, directional diffuser 3 comprises the first refractive layer 31 and the second refractor 32 with refringence, second refractor 32 is coated on first refractive layer 31, first refractive layer 31 is provided with the diffusion unit 311 of multiple array arrangement, and the height of directional diffuser 3 is more than or equal to the height of diffusion unit 311.Because first refractive layer 31 is different from the refractive index of the second refractor 32, therefore, the light that liquid crystal lens 2 sends enters in directional diffuser 3 through second substrate 22, the refraction of light is there is once in light at the boundary of diffusion unit 311, light is injected in air by directional diffuser 3, the refraction of light is there is again at the boundary of the second refractor 32, namely light is in directional diffuser, just enter in the eye of beholder after twice refraction, therefore, directional diffuser 3 spreads further to light, light after diffusion can become and more disperse within the scope of whole view field space, the bright spot phenomenon produced owing to there is refringence because of liquid crystal molecule 23 and spacer 24 that beholder sees, well improved.When light enters first refractive layer 31, because diffusion unit 311 is arranged in array, the light bright dipping after diffusion unit 311 reflects is more even.As shown in Figure 5, when the height of directional diffuser 3 equals the height of diffusion unit 311, light only carries out once the refraction of light at the peak place of diffusion unit 311, improves the light emission rate of liquid crystal lens 2.As shown in Figure 6, directional diffuser 3a comprises first refractive layer 31a and the second refractor 32a, first refractive layer 31a comprises the diffusion unit 311a be arranged in array, when the height of directional diffuser 3a is greater than the height of diffusion unit 311a, light enters diffusion unit 311a, in the refraction of the boundary generation light of diffusion unit 311a, the light after refraction enters in the second refractor 32a, and the refraction of light occurs again at the boundary of the second refractor 32a.As shown in Figure 2, because directional diffuser 3 is in 2D/3D switchable stereo display device, should guarantee that the height of directional diffuser 3 is moderate, if the excessive height of directional diffuser 3, then can reduce the light emission rate of liquid crystal lens 2, bring adverse influence.Confirm through test, the height of directional diffuser 3 can exceed 15 ~ 80mm than the height of diffusion unit 311, not only eliminates the bright spot problem of spacer 24, and can not affect the bright dipping of liquid crystal lens 2.
As the further improvement of above-described embodiment, as shown in Fig. 2, Fig. 3 and Fig. 5, liquid crystal lens unit goes out the non-focus place of luminous point A at diffusion unit 311 on second substrate 22.As shown in Figure 2, there is the problem of bright spot for solving spacer 24 place further, liquid crystal lens 2 arranges directional diffuser 3, the bright dipping of liquid crystal lens 2 is spread.Particularly, the bright dipping of the diffusion unit 311 pairs of liquid crystal lens 2 in directional diffuser 3 is spread, by arranging the focal length of diffusion unit 311, liquid crystal lens unit is made to go out the non-focus place of luminous point A at diffusion unit 311 on second substrate 22, like this, the light that liquid crystal lens unit sends is after diffusion unit 311 reflects, in diffusion type, light after diffusion can become and more disperse within the scope of whole view field space, beholder, when watching 2D/3D switchable stereo display device, weakens the bright spot of spacer 24 place generation or color some phenomenon.
It should be noted that, Fig. 3 is only the present embodiment paths route schematic diagram, and the distance gone out in figure between luminous point A and diffusion unit 311 does not represent actual range.
As the preferred implementation of above-described embodiment, as Fig. 2, shown in Fig. 3 and Fig. 6, the focal length of diffusion unit 311 is f, the distance gone out between luminous point A and diffusion unit 311 is l, and l≤0.5f or l > 2f, because 2D/3D switchable stereo display device is to the requirement of the light emission rate of liquid crystal lens 2, the focal length of diffusion unit 311 is not easily too large, again because directional diffuser 3 can adopt industrial glue to be fixedly mounted on liquid crystal lens 2, the focal distance f of diffusion unit 311 should be greater than or less than the distance between second substrate 22 and first refractive layer 31, namely the focal distance f of diffusion unit 311 is greater than or less than the thickness of glue-line, guarantee that liquid crystal lens 2 goes out luminous point A not in the focus of diffusion unit 311, like this, the light that liquid crystal lens 2 sends enters in directional diffuser 3, further diffusion, light after spreading is disperseed more.
As the further embodiment of above-described embodiment, diffusion unit 311 can be concavees lens, also can be convex lens, and directional diffuser 3 is the lens combination that two kinds of refractive indexes are different.As shown in Figure 5, the cross sectional shape of diffusion unit 311 is arc, and the bright dipping of liquid crystal lens 2 enters in directional diffuser 3, and light reflects at the boundary of diffusion unit 311.Or, as shown in Fig. 2 and Fig. 7, the bright dipping of liquid crystal lens 2 enters in directional diffuser 3b, directional diffuser 3b comprises first refractive layer 31b and the second refractor 32b, first refractive layer 31b comprises the diffusion unit 311b be arranged in array, the cross sectional shape of diffusion unit 311b is triangle, and light reflects at the boundary of diffusion unit 311b.Or, as shown in Fig. 2 and Fig. 8, the bright dipping of liquid crystal lens 2 enters in directional diffuser 3c, directional diffuser 3c comprises first refractive layer 31c and the second refractor 32c, first refractive layer 31c comprises the diffusion unit 311c be arranged in array, the cross sectional shape of diffusion unit 311c is triangle, and light reflects at the boundary of diffusion unit 311c.Certainly; the cross sectional shape of diffusion unit 311 also can be other rules or irregularly shaped; the diffusion unit 311 realizing having light refraction action all belongs within protection scope of the present invention; determination that should be undoubted; diffusion unit 311 cross sectional shape that the present embodiment provides; be only applicable to illustrate, the lens of rule are more prone to processing.
As the preferred implementation of above-described embodiment, as shown in Figure 2 and Figure 3, the cross section of diffusion unit 311 is semicircle, and the regular shape of diffusion unit 311, is convenient to processing, and reduces manufacturing cost.Simultaneously, the diameter d of diffusion unit 311 is less than the diameter of liquid crystal lens unit, like this, the bright dipping of each liquid crystal lens unit can to there being multiple diffusion unit 311, diffusion unit 311 pairs of light reflect, light after refraction becomes and more disperses within the scope of view field space, slackens the bright spot phenomenon at spacer 24 place further.
As the preferred implementation of above-described embodiment, as shown in Figure 2 and Figure 3, the diameter d of diffusion unit 311 is 13 ~ 23 times of spacer 24 diameter, 2D/3D switchable stereo display device is when 2D shows, control module controls the first voltage put between first substrate 21 and second substrate 22, first voltage produces the first equal electric field of electric field intensity, under the effect of the first electric field, refringence between liquid crystal molecule 23 and spacer 24 is in preset range, although, now the refractive index of liquid crystal molecule 23 is close to the refractive index of spacer 24, but, the light that display panel 1 sends is when spacer 24, still there is part light, at spacer 24 place, the refraction of light can occur, refraction is further there is in the bright dipping of the directional diffuser 3 pairs of liquid crystal lens 2 arranged at diffusion unit 311 place, to weaken the bright spot phenomenon of spacer 24, the diameter d of diffusion unit 311 is less than spacer 24 diameter, guarantee to spread the bright dipping of liquid crystal lens 2.
As the further embodiment of above-described embodiment, as shown in Figure 5, the height of directional diffuser 3 equals the height of diffusion unit 311, the height of diffusion unit 311
for the cross section of diffusion unit 311 for semicircle, the height h of diffusion unit 311 is determined by the focal distance f of diffusion unit 311 and diameter d, according to geometric relationship, obtain the height h of diffusion unit 311, according to height h, focal distance f and diameter d can be processed and be generated diffusion unit 311, and diffusion unit 311 structure is simple, are easy to manufacture.
As the further embodiment of above-described embodiment, as shown in figures 2 and 5, the refractive index of first refractive layer 31 is N
1, the refractive index of the second refractor 32 is N
2, the refractive indices n=|N of first refractive layer 31 and the second refractor 32
1-N
2|>=0.1.At present, the refractive index selected has n=1.46,1.51,1.59,1.60.As shown in Fig. 2 and Fig. 9, choose the refractive index N of first refractive layer 31 ＇
1be the refractive index N of the 1.59, second refractor 32 ＇
2be 1.60, obtain first refractive layer 31 ＇ and the second refractor 32 ＇ to the refracted ray schematic diagram of liquid crystal lens 2 bright dipping.As shown in Fig. 2 and Figure 10, choose the refractive index N of first refractive layer 31
1be the refractive index N of the 1.46, second refractor 32
2be 1.60, obtain the refracted ray schematic diagram of first refractive layer 31 and the bright dipping of the second refractor 32 pairs of liquid crystal lens 2.To two width refracted ray schematic diagram, can be undoubted draw, meeting under the prerequisite that 2D/3D switchable stereo display device normally shows, the refractive indices n of first refractive layer 31 and the second refractor 32 is larger, the diffusion of directional diffuser 3 to light is better, light after refraction becomes and more disperses within the scope of view field space, slackens the bright spot phenomenon at spacer 24 place further.
As the further embodiment of above-described embodiment, as shown in figures 2 and 5, first refractive layer 31 is an OCA optical cement or a UV glue, and the second refractor 32 is the 2nd UV glue or the 2nd OCA optical cement.When making directional diffuser, alternatives has first refractive layer 31 to be an OCA optical cement, second refractor 32 is the two OCA optical cement different from first refractive layer 31 refractive index or the 2nd UV glue, or, first refractive layer 31 is a UV glue, and the second refractor 32 is the two OCA optical cement different from first refractive layer 31 refractive index or the 2nd UV glue.For ensureing that directional diffuser 3 is fixedly mounted on liquid crystal lens 2, industrial glue is coated with, namely by glue-line fixed orientation fan diffuser, because OCA glue, UV glue have good cohesive between directional diffuser 3 and liquid crystal lens 2, bonding more firm, and the bright dipping of liquid crystal lens 2 can not be affected.
OCA (OpticallyClearAdhesive) is for the extraordinary adhesive of cementing transparent optical element (as camera lens etc.).Requirement have water white transparency, light transmission rate more than 90%, consolidation strength is good, can solidify under room temperature or middle temperature, and have the features such as cure shrinkage is little.
UV glue is also known as without shadow glue, light-sensitive emulsion, ultraviolet cured adhesive, and it refers to a class tackifier that could must be solidified by ultraviolet light irradiation, and it can use as bonding agent, and the sizing material that also can be used as paint, coating, ink etc. uses.UV adhesive curing principle produces living radical or kation after the light trigger (or photosensitizer) in UV curing materials absorbs ultraviolet light under ultraviolet irradiation, trigger monomer polymerization, crosslinked and connect a chemical reaction, make bonding agent be solid-state by liquid conversion within the several seconds.
As the further embodiment of above-described embodiment, as shown in Figure 2, an OCA optical cement, the 2nd OCA optical cement, a UV glue, the 2nd UV glue all include resin.Resin, as conventional chemicals, draw materials easily, and resin is easy to fit with second substrate 22, more convenient to operate.
In the present embodiment, the main body of the one OCA optical cement, the 2nd OCA optical cement, a UV glue, the 2nd UV glue is all resin, the main body of the one OCA optical cement, the 2nd OCA optical cement can be acrylic type resin and unsaturated polyester (UP), polyurethane, epoxy resin, when selecting, the main body of the one OCA optical cement is unsaturated polyester (UP), and the main body of the 2nd OCA optical cement is polyurethane, and an OCA glue is different from the composition of the 2nd OCA glue, therefore, an OCA glue is different from the refractive index of the 2nd OCA glue.Same, the main body of a UV glue, the 2nd UV glue is ideal with epoxy (methyl) acrylate, certainly also can select polyurethane (methyl) acrylate, organosilicon (methyl) acrylate.When selecting, the main body of the one UV glue is epoxy (methyl) acrylate, and the main body of the 2nd UV glue is polyurethane (methyl) acrylate, and a UV glue is different from the composition of the 2nd UV glue, therefore, a UV glue is different from the refractive index of the 2nd UV glue.And be grouped into by the one-tenth of change the one OCA optical cement, the 2nd OCA optical cement, a UV glue, the 2nd UV glue, guarantee that an OCA optical cement, the 2nd OCA optical cement, a UV glue, the 2nd UV glue refractive index are each other not identical, there is refringence.
Embodiment two
As shown in figure 12, the 2D/3D switchable stereo display device that the present embodiment provides and embodiment one provide the structure of 2D/3D switchable stereo display device substantially identical, and display panel 1C and liquid crystal lens 2C, liquid crystal lens 2C is arranged at the light emission side of display panel 1C.Liquid crystal lens 2C comprises the first substrate 21C and second substrate 22C that are oppositely arranged, and second substrate 22C is arranged at the top of first substrate 21C, is provided with liquid crystal molecule 23C and spacer 24C between first substrate 21C and second substrate 22C.Difference is, is provided with the 3rd electrode 26C between first substrate 21C and the first electrode 25C, is provided with insulation course 27C between the 3rd electrode 26C and the first electrode 25C, and each first electrode 25C is located on insulation course 27C.When 2D/3D switchable stereo display device is in 2D display, control module controls the first voltage put between first substrate 21C and second substrate 22C, first voltage produces the first equal electric field (not shown) of electric field intensity, first electric field driven liquid crystal molecule 23C deflects, make refringence between liquid crystal molecule 23C and spacer 24C in preset range, the condition meeting preset range is that the difference between the refractive index of spacer 24C and liquid crystal molecule 23C refractive index is less than 0.1, now, the refractive index of liquid crystal molecule 23C is close to the refractive index of spacer 24C.
Particularly, 3rd driving voltage is applied to the 3rd electrode 26C, four-wheel drive voltage is applied to the second electrode, 3rd difference between driving voltage and four-wheel drive voltage is the first voltage, first voltage forms the first equal electric field of electric field intensity between first substrate 21C with second substrate 22C, under the effect of the first electric field, the refractive index of all liquid crystal molecule 23C is identical, and the refringence met between liquid crystal molecule 23C and spacer 24C is in preset range, now, the refractive index of liquid crystal molecule 23C is close to the refractive index of spacer 24C.Therefore, the light sent as display panel 1C is through liquid crystal molecule 23C and spacer 24C, the refraction of light can not be produced, solve existing 2D/3D switchable stereo display device be in 2D display time, because liquid crystal molecule 23C is different from the refractive index of spacer 24C, light is reflecting through spacer 24C, when causing human eye to watch 2D/3D switchable stereo display device, occurs the problem of bright spot at spacer 24C place.In the present embodiment, when 2D/3D switchable stereo display device is used for 2D display, can driving voltage be applied to the first electrode 25C, also can not apply driving voltage, all can not affect the normal display of 2D/3D switchable stereo display device.
Preferably, the 3rd electrode 26C can be face electrode or strip electrode.
When 2D/3D switchable stereo display device is used for 3D display, 7th driving voltage is applied to multiple first electrode 25C, second electrode applies the 8th driving voltage, 3rd electrode 26C applies the 9th driving voltage, cooperatively interact between each driving voltage, guarantee that 2D/3D switchable stereo display device is when 3D shows, liquid crystal lens 2C presents stereo-picture.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1.2D/3D switchable stereo display device, comprise display panel, be located at the liquid crystal lens of described display panel light emission side, described liquid crystal lens comprises the first substrate and second substrate that are oppositely arranged, and the liquid crystal molecule be arranged between described first substrate and described second substrate and spacer, described first substrate is provided with multiple first electrode, all keep at a certain distance away between first electrode described in adjacent two, described second substrate is provided with the second electrode, it is characterized in that: also comprise control module, for controlling the first voltage put between described first substrate and described second substrate, when described 2D/3D switchable stereo display device is in 2D display, described first voltage is for generation of equal the first electric field of electric field intensity, liquid crystal deflecting element described in described first electric field driven, to make refringence between described liquid crystal molecule and described spacer in preset range, wherein said preset range, refers to that the refringence between described spacer and described liquid crystal molecule is less than 0.1.
2. 2D/3D switchable stereo display device as claimed in claim 1, it is characterized in that: described control module controls to put on the first driving voltage on multiple described first electrode and the second driving voltage on described second electrode, and the difference between described first driving voltage and described second driving voltage is described first voltage.
3. 2D/3D switchable stereo display device as claimed in claim 1, it is characterized in that: also comprise the 3rd electrode be arranged between described first substrate and described first electrode, insulation course is provided with between described 3rd electrode and described first electrode, each described first electrode is arranged on described insulation course, described control module controls to put on the 3rd driving voltage on described 3rd electrode and the four-wheel drive voltage on described second electrode, and the difference between described 3rd driving voltage and described four-wheel drive voltage is described first voltage.
4. 2D/3D switchable stereo display device as claimed any one in claims 1 to 3, is characterized in that: described first voltage is greater than the threshold voltage of described liquid crystal molecule.
5. 2D/3D switchable stereo display device as claimed in claim 4, is characterized in that: the threshold voltage of described liquid crystal molecule is v
th, described first voltage is u
0, and 1.5v
th≤ u
0≤ 4v
th.
6. 2D/3D switchable stereo display device as claimed in claim 5, it is characterized in that: described control module is also for controlling the second voltage put between described first substrate and described second substrate, when described 2D/3D switchable stereo display device is in 3D display, the second electric field that described second voltage does not wait for generation of electric field intensity, described in described second electric field driven, liquid crystal deflecting element forms the liquid crystal lens unit that array is arranged.
7. 2D/3D switchable stereo display device as claimed in claim 6, is characterized in that: also comprise the directional diffuser of the bright dipping of described liquid crystal lens being carried out to directed diffusion, described directional diffuser is arranged on the side of described liquid crystal lens bright dipping.
8. 2D/3D switchable stereo display device as claimed in claim 7, it is characterized in that: described directional diffuser and described liquid crystal lens are that angle is arranged, the angle initialization of described angle makes the normal bright dipping when 3D shows of described liquid crystal lens.
9. 2D/3D switchable stereo display device as claimed in claim 8, is characterized in that: described angle is α, and 60 °≤α≤120 °.
10. 2D/3D switchable stereo display device as claimed in claim 9, is characterized in that: described angle α=90 °.
11. 2D/3D switchable stereo display devices according to any one of claim 7 to 10, it is characterized in that: described directional diffuser comprises the first refractive layer with refringence and the second refractor be coated on described first refractive layer, and described first refractive layer is provided with multiple diffusion unit be arranged in array.
12. 2D/3D switchable stereo display devices as claimed in claim 11, is characterized in that: each described liquid crystal lens unit goes out the non-focus place of luminous point at described diffusion unit on described second substrate.
13. 2D/3D switchable stereo display devices as claimed in claim 12, is characterized in that: the focal length of described diffusion unit is f, described in the distance gone out between luminous point and described diffusion unit be l, and l≤0.5f or l > 2f.
14. 2D/3D switchable stereo display devices as claimed in claim 13, is characterized in that: the cross sectional shape of described diffusion unit is for semicircle, and the diameter d of described diffusion unit is less than the diameter of described liquid crystal lens unit.
15. 2D/3D switchable stereo display devices as claimed in claim 14, is characterized in that: the height of described directional diffuser equals the height of described diffusion unit, the height of described diffusion unit
16. 2D/3D switchable stereo display devices as claimed in claim 15, is characterized in that: the refractive index of described first refractive layer is N
1, the refractive index of described second refractor is N
2, the refractive indices n=|N of described first refractive layer and described second refractor
1-N
2|>=0.1.
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| CN201410289749.2A CN104090445B (en) | 2014-06-24 | 2014-06-24 | 2d/3d switchable stereo display device |
| PCT/CN2015/082042 WO2015196959A1 (en) | 2014-06-24 | 2015-06-23 | 2d/3d switchable stereo display device |
| US14/849,686 US9798216B2 (en) | 2014-06-24 | 2015-09-10 | 2D/3D switchable stereoscopic display apparatus |
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| CN104090445B (en) * | 2014-06-24 | 2016-02-17 | 深圳超多维光电子有限公司 | 2d/3d switchable stereo display device |
| CN104460017B (en) * | 2014-12-30 | 2017-01-18 | 深圳市华星光电技术有限公司 | 3d display device |
| CN105629469B (en) * | 2016-01-12 | 2019-03-15 | 叠境数字科技（上海）有限公司 | Head-mounted display apparatus based on liquid crystal lens array |
| CN110611040B (en) * | 2019-08-21 | 2021-08-24 | 武汉华星光电半导体显示技术有限公司 | A package structure, display panel and display device |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200416 Address after: 518000 Guangdong, Shenzhen, Nanshan District, Guangdong Province, South Korea Road eight South Road 12 super multi dimensional science and technology building 17. Patentee after: SUPERD Co.,Ltd. Address before: 201, room 518053, building A, No. 1, front Bay Road, Qianhai, Shenzhen Guangdong cooperation zone (Shenzhen Qianhai business secretary Co., Ltd.) Patentee before: SUPERD Co.,Ltd. |